Zeta1 Antliae

Zeta1 Antliae is the Bayer designation for a binary star[3] system in the southern constellation of Antlia. Based upon parallax measurements, the pair are located at a distance of roughly 410 light-years (130 parsecs) from Earth.[1] Both components are rapidly rotating[4] A-type main sequence stars.[3] They have apparent magnitudes of +6.20 and +7.01 and are separated by 8.042 arcseconds.[3] The apparent magnitude of the combined system is +5.76,[2] which is bright enough to be seen with the naked eye in suitably dark skies.

For other stars with this designation, see Zeta Antliae.
Zeta1 Antliae
ζ1 Antliae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension  09h 30m 46.09678s[1]
Declination –31° 53′ 21.1911″[1]
Apparent magnitude (V) 5.76[2] (6.20/7.01)[3]
Characteristics
Spectral type A0 V + A2 V[3]
U−B color index +0.05[2]
B−V color index +0.05[2]
Astrometry
Proper motion (μ) RA: +22.31[1] mas/yr
Dec.: –20.12[1] mas/yr
Parallax (π)8.04 ± 0.72[1] mas
Distance410 ± 40 ly
(120 ± 10 pc)
Details
ζ1 Ant A
Rotational velocity (v sin i)204[4] km/s
ζ1 Ant B
Rotational velocity (v sin i)50[4] km/s
Other designations
HIP 46657, CD−31° 7355, CCDM 09308-3153.[5]
ζ1 Ant A: GC 13137, HD 82384, HR 3781, SAO 200445.
ζ1 Ant B: GC 13135, HD 82383, HR 3780, SAO 200444
Database references
SIMBADdata

References
  1. van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. Hurly, P. R. (1975), "Combined-light UBV Photometry of 103 Bright Southern Visual Doubles", Monthly Notes of the Astronomical Society of Southern Africa, 34: 7, Bibcode:1975MNSSA..34....7H.
  3. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
  4. Royer, F.; et al. (January 2012), "Rotational velocities of A-type stars. I. Measurement of v sin i in the southern hemisphere", Astronomy and Astrophysics, 381: 105–121, arXiv:astro-ph/0110490, Bibcode:2002A&A...381..105R, doi:10.1051/0004-6361:20011422.
  5. "IDS 09265-3127 AB -- Double or multiple star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-06-27.


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